Propeller



April 9, 1940- o. o. WISTE 2,196,573

, PROPELLER Filed June 12, 1939 0261.1) 0. INVENTOR ATTORN EYS Patented 7 Apr; 9, 1940 UNITED STATES PRO L ER it Olav O. Wiste, Glendon, AlbertafCanada. Application June 12, 1939, Serial"No.2"7 8,793 fol-ai (01. 110-68) My invention relatesto propellers and has as one of the principal objects .thereof the provision ofa propeller in which the blades are automatically adjusted according to the velocity of the wind, thedevice being especially adaptable for use in connection with wind operated generators and the like.

Another object of my device is to provide a device of the character described which is simple in construction, durable in use, eflicientin operation and economical in manufacture;

Other objects and advantages will be apparent from the following description, appended claimiand annexed drawing. I

Referring to the drawing wherein like reference characters designate like parts throughout I ,plication in advance forms, and that the invention comprehends all const'n ction within the the several views: V v

Figure l is a front elevation of my invention, partly in section, the cover plate of the hub housing being removed.

Figure 2 is a sectional 2-2 ofFigure 1.

taken on the line In practicing my invention, I provide a propeller hub housing 5, the latter being of, an oil tight construction and able front plate 6 for permitting access to the interior of the housing. The housing 5 is con nected to the drive shaft 1 of av wind operated generator (not shown). The housing is fashioned with end walls 8 having'threadedly and adjustably-mounted therein bushings 9 through which extend the outersec'tions of blade carrying shafts ill, the outer ends of said shafts being fixed to the lower ends of propeller blades H. The inner ends of the shafts are journaled in bearings 32 arranged in axial alignment with the bushingsS; The bearings, l2 are provided in their sides, with angular slots l3 in which are operable rollers l4 rotatably mounted on the ends of pins l5 extending into and fixed to the lower ends of the shafts Ill. The shafts have fixed thereto, between their "respective bushings and bearings Q and I2, gears 16 meshing with each other and interposed between said gears and the respective bushings are coil springs ll surrounding said shafts.

Obviously, by adjusting tive to the housing, the tension of the coil springs ll may be varied, whereby, upon rotation of the housing, the inner ends of the shafts Ill, through the medium of centrifugal force, are actuated towards the respective bushings and against the tension'of the springs l'l. When the inner ends are thus actuated, the rollers. engaging the walls of the slots l3 serve to effect rotatable adjustment of the respective shafts and thereby Varythe V pitch of theblades.

provided with a detach to the housing.

blades attached thereto.

the bushings 9 rela- From the foregoing it will be apparent that I have provided a simple and efficient device for automatically varying the pitch of propeller j blades and that the same is capable of manual adjustment whereby the pitch of said blades may be initially set to develop a desired speed in ac- It is also.- obvious confined to the herein" described use therefor as is adaptable.

of operation which are capable of extended apscope of the appended claim.

Furthermore, it can be readily understood that I the slots 13 in the bearings l2 permit variation that the invention is not of the propeller pitch to allow starting in winds of extremely low velocity as well as acting as governors in winds of relatively high velocity for Y the reason that the slots l3 are defined by pairs of space'dwalls providing tracks for the respective rollers and each wall is fashioned with a pair of oppositely inclined sections whereby oscillatory movement is imparted to the shafts when the latter are axially moved with respect The oscillatory movement of the to vary the .pitch of the propeller I The acute angles of the slots it coast with the pins to dispose the blades H with an initially high pitch (for a large starting torque) and which becomes low for high speeds and then becomes high extremely high speeds.

What I claimis: A device of the character described, comprisshafts serves 'ing, a housing, bushings adjustably mounted in said housing, shafts extending through said bushings into said housing and axially and rotatably adjustable relative to said bushings, bearings arranged in'said housing and receiving the inner ends of said shafts, said bearings formed withangular slots, pins carried by said shafts and operable in said slots for effecting rotatable adjustment of said "shafts relative to said housing, gears carried by said shafts and slidably meshingkwith each other, springs on said shafts between said gears andbushings and adjustable by the latter to effect axial adjust mentof said shafts; v q

' I OLAVO. WISTE.

has

again at v it may be utilized for anypurpose to which it It is therefore to be distinctly understood that the invention is not limited to the specific construction asillu'strated and described,

as the same is only illustrative of the principles I5 

